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Fencer Vulns
high 7.5

CVE-2022-0711 in the critical feed json

A flaw was found in the way HAProxy processed HTTP responses containing the "Set-Cookie2" header.

published 2022-03-02 4 y ago modified 2026-09-08 2 mo ago also BIT-haproxy-2022-0711 , EUVD-2022-15786

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
16.6%
EPSS 16.6% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

A flaw was found in the way HAProxy processed HTTP responses containing the "Set-Cookie2" header. This flaw could allow an attacker to send crafted HTTP response packets which lead to an infinite loop, eventually resulting in a denial of service condition. The highest threat from this vulnerability is availability.

Patch / fix

  • bitnami haproxy 2.2.21, 2.3.18, 2.4.13
  • haproxy haproxy 2.2.21, 2.3.18, 2.4.13
  • haproxy Debian 14, Debian 13, Debian 12 2.4.13-1

debian advisories DEBIAN-CVE-2022-0711

  • haproxy Ubuntu 20.04 LTS 2.0.13-2ubuntu0.5

ubuntu advisories UBUNTU-CVE-2022-0711

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • haproxy openshift 4.6 2.0.16-3.el7
  • haproxy openshift 4.6 2.0.16-5.el8
  • haproxy20 openshift 4.6 2.0.16-3.el7
  • haproxy20 openshift 4.6 2.0.16-5.el8
  • jenkins-2-plugins openshift 4.6 4.6.1650364520-1.el8
  • haproxy openshift 4.7 2.0.19-3.el7
  • haproxy openshift 4.7 2.0.19-3.el8
  • haproxy20 openshift 4.7 2.0.19-3.el7

red hat advisories RHSA-2022:1620RHSA-2022:1336RHSA-2022:1153RHSA-2022:1021

  • haproxy SLE High Availability Extension 15 SP4, openSUSE Leap 15.4 2.4.8+git0.d1f8d41e0-150400.3.3.13

suse advisories SUSE-SU-2022:2277-1

  • haproxy openSUSE Tumbleweed 2.5.4+git0.e55ab4208-1.1

opensuse advisories openSUSE-SU-2024:11876-1

  • haproxy Alpine 3.13, Alpine 3.12 2.2.21-r0

alpine advisories ALPINE-CVE-2022-0711

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • haproxy CBL-Mariner 2.0 2.4.13-1

azure linux advisories AZL-8899

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-0711 updated cvss 7.5

haproxy: Denial of service via set-cookie2 header

  • Red Hat OpenShift Container Platform 4.6 haproxy 2.0.16-3.el7, haproxy 2.0.16-5.el8, haproxy20 2.0.16-3.el7, haproxy20 2.0.16-5.el8
    fixed: vendor fix RHSA-2022:1620
  • Red Hat OpenShift Container Platform 4.7 haproxy 2.0.19-3.el7, haproxy 2.0.19-3.el8, haproxy20 2.0.19-3.el7, haproxy20 2.0.19-3.el8
    fixed: vendor fix RHSA-2022:1336
  • Red Hat OpenShift Container Platform 4.8 haproxy 2.2.13-3.el8, haproxy22 2.2.13-3.el8
    fixed: vendor fix RHSA-2022:1153
  • Red Hat OpenShift Container Platform 4.9 haproxy 2.2.15-4.el8, haproxy22 2.2.15-4.el8
    fixed: vendor fix RHSA-2022:1021
  • Red Hat Enterprise Linux 6 haproxy Red Hat Enterprise Linux 7 haproxy Red Hat Enterprise Linux 8 haproxy Red Hat Enterprise Linux 9 haproxy Red Hat OpenShift Container Platform 3.11 haproxy, haproxy18 Red Hat OpenShift Container Platform 4.6 python-boto 2.34.0-5.el7, cri-o 1.19.6-3.rhaos4.6.git3c20b65.el7, cri-o 1.19.6-3.rhaos4.6.git3c20b65.el8, jenkins-2-plugins 4.6.1650364520-1.el8, openshift 4.6.0-202203141645.p0.gec4226d.assembly.stream.el7, openshift 4.6.0-202203141645.p0.gec4226d.assembly.stream.el8, +2 more
    +3 more products
    Red Hat OpenShift Container Platform 4.8 cri-tools 1.21.0-4.el8, ovn2.13 20.12.0-196.el8fdp, butane 0.12.1-2.rhaos4.8.1.el8, ignition 2.9.0-8.rhaos4.8.1.el8, ovn2.13-host 20.12.0-196.el8fdp, ovn2.13-vtep 20.12.0-196.el8fdp, +14 more Red Hat OpenShift Container Platform 4.9 runc 1.0.1-3.rhaos4.9.git4144b63.el8, cri-o 1.22.3-2.rhaos4.9.git28c5a70.el7, cri-o 1.22.3-2.rhaos4.9.git28c5a70.el8, jenkins-2-plugins 4.9.1647580879-1.el8, openshift-ansible 4.9.0-202203150226.p0.g8abf85e.assembly.stream.el7, openshift-clients 4.9.0-202203221324.p0.ga646be5.assembly.stream.el7, +4 more Red Hat Software Collections rh-haproxy18-haproxy, rh-haproxy18-haproxy-syspaths
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

16.56% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami haproxy
>=2.2.0, <2.2.21
>=2.3.0, <2.3.18
>=2.4.0, <2.4.13
2.2.21
2.3.18
2.4.13

Affected products

  • n/a haproxy

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.